MQ-4 Gas Sensor Module D-Type this shield board features numerous

this shield board features numerous pins

It is an ON-ON type switch that can be used as a general-purpose ON/OFF switch

Resistance 150 ohm (151) Brand Resistor Chip size 0805 Tolerance 5% Power 1/8W Temperature Range -55°C to +125°C Mounting Type Surface mount No

OPDO pin is open drain output

component count

MQ-4 Gas Sensor Module D-Type this shield board features numerousThis MQ4 Methane Gas sensor module can sense the presence of compressed Natural Gas sensors (CNG), methane(CH4) etc. in the air. This is a very easy to use low cost semiconductor Gas sensor Module with analog and digital output. It requires no external components just plug in VCC & ground pins and you are ready to go. It is small sensitive to alcohol and smoke. This module has an IC LM393 is a dual differential comparator; this means that it accepts 2